Don't use Verizon EVDO for your Justin.tv clone

"The Unlimited Data Plans and Features MAY NOT be used for any other purpose. Examples of prohibited uses include, without limitation, the following: (i) continuous uploading, downloading or streaming of audio or video programming or games; (ii) server devices or host computer applications, including, but not limited to, Web camera posts or broadcasts, automatic data feeds, automated machine-to-machine connections or peer-to-peer (P2P) file sharing; or (iii) as a substitute or backup for private lines or dedicated data connections. This means, by way of example only, that checking email, surfing the Internet, downloading legally acquired songs, and/or visiting corporate intranets is permitted, but downloading movies using P2P file sharing services and/or redirecting television signals for viewing on laptops is prohibited. A person engaged in prohibited uses, continuously for one hour, could typically use 100 to 200 MBs, or, if engaged in prohibited uses for 10 hours a day, 7 days a week, could use more than 5 GBs in a month"

I wonder what they would have to say about Joost!

Does anyone have Sprint EVDO or EDGE with AT&T or Cingular and know if they have this same restriction?

I suspect as the popularity of streaming high-bandwidth content to cell phones increases there will be less control over this by carriers.

In the early days of broadband many ISPs would have clauses like this. With everyone now bittorrenting and streaming media theres really nothing the ISPs can do, except some cheap stuff like traffic shaping (not so much in the US though). I think its only a short matter of time when cell carriers are forced to give in and just allow it. Otherwise the ones who don't will start losing customers to the ones who do...